Label name and $

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Roman

Joined: 21 Apr 2012
Posts: 1769

Roman 08 May 2023, 09:35

Fasmw 1.73

Code:

Lb1:.a: mov eax,$

My question $ = Lb1(as name) ?
Or $=address number but not as name Lb1 ?

And exist fasm symbol to get lb1 name, for using in match ?

Code:

Lb1:.a: match x=: d, $1:$2 {
If d eq .a
 do something 
end if
}
;x=Lb1 and d=.a

Last edited by Roman on 08 May 2023, 09:58; edited 1 time in total

08 May 2023, 09:35

macomics

Joined: 26 Jan 2021
Posts: 928
Location: Russia

macomics 08 May 2023, 09:57

Code:

use32
org 0
Lb1:.a:mov eax, $

Code:

 ~ $ fasm -m 64 ./main.asm
flat assembler  version 1.73.30  (64 kilobytes memory)
1 passes, 5 bytes.

 ~ $ hexdump -C ./main.bin
00000000  b8 00 00 00 00                                    |.....|

=> mov eax, $$ = mov eax, $ = mov eax, Lb1 = mov eax, .a = mov eax, 0

Code:

use32
org 0 ; <= $$
Lb1:.a:mov eax, $
mov eax, $$
mov eax, .a
nop
mov eax, Lb1
mov eax, $
mov eax, $$

Code:

 ~ $ fasm -m 64 ./main.asm
flat assembler  version 1.73.30  (64 kilobytes memory)
1 passes, 31 bytes.

 ~ $ hexdump -C ./main.bin
00000000  b8 00 00 00 00 b8 00 00  00 00 b8 00 00 00 00 90  |................|
00000010  b8 00 00 00 00 b8 15 00  00 00 b8 00 00 00 00     |...............|

http://flatassembler.net/docs.php?article=manual#1.2.3

08 May 2023, 09:57

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20302
Location: In your JS exploiting you and your system

revolution 08 May 2023, 12:37

Roman wrote:

Code:

Lb1:.a: mov eax,$

Putting all that on the same line makes no difference, It is the same as:

Code:

Lb1:
.a:
mov eax,$

08 May 2023, 12:37

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